Liberty Cap: 11 m Travertine Hot Spring Cone at Mammoth Hot Springs, Yellowstone National Park

Q: Is it worth the 135-yard boardwalk to see Liberty Cap?

Yes. The boardwalk provides close views of a 37-foot travertine cone and lets you read signs that explain 2,500 years of mineral deposition and hydrothermal activity.

Q: Can I bring kids or an elderly relative to Liberty Cap?

Yes, but plan for the boardwalk transitions; some sections are flat and wheelchair-accessible while others include stairs or slopes. Stay close and supervise near edges.

Q: Is the water or cone safe to touch?

No. Hydrothermal water is extremely hot and mineral crusts are fragile; touching can cause burns and damage the depositional structure.

Q: What should I expect for wildlife while viewing Liberty Cap?

Elk and other wildlife frequent the Mammoth area; keep a safe distance, follow park guidelines, and do not approach animals.

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Overview

About This Attraction

A white travertine cone rises 37 feet above the Lower Terraces, its mineral crust catching light as water once pushed calcium carbonate into a towering mound. This growth marks about 2,500 years of deposition from a spring that stayed active in one spot, building the cone over centuries. It stands as a tangible record of Yellowstone's shifting geothermal system.

Best Time to Visit

Spring melt in May and fall sunrise offer the best light for Liberty Cap; midday glare and crowds peak in summer.

Visitor Tips

Stay on boardwalks; thermal crusts are fragile.
Wear traction cleats in winter; boardwalks can be icy.
Bear spray is commonly recommended in Yellowstone; keep distance from wildlife.
Arrive early to beat crowds; parking near Liberty Cap can fill by afternoon.
Use interpretive signs to understand travertine growth patterns.

Reviews

★★★★☆

4.7 /5

Based on 812 Google reviews

Reviews from Google

I promised myself I wasn't going to make a joke... But it's really HARD not to 😂Ok but seriously, this is an incredibly cool feature and definitely not one you're going to miss if you are in Mammoth. Not observably active at the moment, but you never know what's coming next at Yellowstone.

Beautiful geological formations. Plenty of signage to explain what you're seeing. Ample parking (though I came in the winter off season, so might not be ample parking in the summer/peak season.)

This is just one of many places to see in Mammoth. Really interesting.

Showing 3 of 812 reviews

FAQs

Do I really need to arrive before 7am to get parking?

Yes. Parking near Liberty Cap can fill by the afternoon, especially in peak season; arriving early yields easier access and shorter waits.

Is it worth the 135-yard boardwalk to see Liberty Cap?

Can I bring kids or an elderly relative to Liberty Cap?

Is the water or cone safe to touch?

What should I expect for wildlife while viewing Liberty Cap?

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Liberty Cap